package com.jzg.sys.common.rest;

import com.google.code.kaptcha.Producer;
import com.jzg.sys.common.util.CommonUtils;
import com.jzg.sys.common.vo.ResultVO;
import com.jzg.sys.manager.BaseCacheManager;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;

@RestController
@RequestMapping("/captchaRest")
public class CaptchaRest extends BaseRest {
    @Autowired
    private Producer captchaProducer = null;
    @Autowired
    private BaseCacheManager cacheService;

    @Value("${cus.sysCode}")
    public String sysCode;

    @RequestMapping("/getTempToken")
    public ResultVO getTempToken() {
        String tempToken = CommonUtils.getUUID();
        cacheService.put(tempToken, tempToken, sysCode,120l);
        return new ResultVO(true, tempToken);
    }

    @RequestMapping("/getValidateImg")
    public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response, String tempToken) throws Exception {
//        HttpSession session = request.getSession();
        if (StringUtils.isEmpty(tempToken)) {
            return null;
        }
        response.setDateHeader("Expires", 0);

        // Set standard HTTP/1.1 no-cache headers.
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");

        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");

        // Set standard HTTP/1.0 no-cache header.
        response.setHeader("Pragma", "no-cache");

        // return a jpeg
        response.setContentType("image/jpeg");

        // create the text for the image
        String capText = captchaProducer.createText();

        // store the text in the session
//        session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);

        // create the image with the text
        BufferedImage bi = captchaProducer.createImage(capText);
        ServletOutputStream out = response.getOutputStream();

        // write the data out
        ImageIO.write(bi, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
        //写入缓存
        cacheService.remove(tempToken, sysCode);
        cacheService.put(tempToken, capText,sysCode, 300l);
        return null;
    }
}